Steam-boiler



(No Model.)

B. R WRIGHT.

, STEAM BGILER. No. 303,690. Patented Aug.l 19, 1884.

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UNrTED STATES PATENT OFFICE.

BENJAMIN F. VRIGHT, OF ONEIDA, KANSAS.

STEAM-BOILER.

SPECIFICATION forming part of Letters Patent No. 303,690, dated August 19, 1884.

Application filed March E", ll,

T @ZZ whom it .may concern,

Be it known that I, BENJAMIN F; Wnrenr, a citizen of the United States, residing at Oneida, in the county of Nemaha and State of Kansas, have invented certain new and useful Improvements in Steam-Boilers, of whichthe following is a description.

My invention relates to steam-boilers in which the gases, smoke, and heated air from the iire are driven directly through the water in the boiler without the aid of flues, thereby coming immediately in contactwith the water', the objects being to prevent the escape and loss of heat, to provide a means for the rapid generation of steam by mixingl hot compressed air through the water, to get the expansive force of the heated air, to secure perfect combustion without losing heat by an excessive supply of air, and to prevent the escape of sparks. I attain these objects by the mechanism shown in the drawing, in which the figure is a vertical section of a steam-boiler embody- A ing my invention.

22 is the outside shell of the boiler,in which is contained the cylindrical fire-box 55, surrounded on all sides by water, and having sliding door 13 worked by lever 51. This sliding door is provided with air-tight packing that will not be affected by heat, and is arranged on the outside surface of the boiler, and opens into the fire-box for supplying solid fuel thereto. Inside the fire-box is the grate 31, with ash-pit 26, having removable screwcap 17 at the bottom for taking out the ashes. Entering the ash-pit are the air-pipes 11 and 12, connecting with cold-air pumps 8 and 9, and

having drop-valves 18 and 25. T o these pumps 8 and 9 are connected the air-cocks 19 19, for

allowing the air to escape from the pump-barof the boiler is'fastened upright 28, in which is fulcrumed a walking-beam or lever, 84, to

` through valves 15 into the boiler.

(No model.)

which are attached pump-rods 2, 4, 5, (i, and 7, Working pumps 8,2),40, 20, and 21, beam 34 .being operated by connecting-rod 35,through which power is transmitted from the engine. (Not shown.) In the bottolns ofthe pumpcylinders 2() and 21 are valves 16 and 27,0pening from the fire-box upwardly into the pumpcylinder, and in an enlargemeiit at the bot: toms of said pump-cylinders are side valves, 14 and 15, which open from the pump-cylinder into the water and steam space of the boiler, the said valves being provided with springs 0 like valves 1 to hold them to their seats.

The operation of the boiler is as follows: When the piston in pump 8 descends, a dropvalve in said piston closes, and valve 1S opens,

admitting air through pipe 11 to the lire-box just beneath the grate 31. At the same time pump 21 also descends, closing valve 16, and forcing the heated air beneath the piston The compressed air in the iirebox now opens valve 27, and follows piston in pump 20, which in descending forces it through valve 14 into the volume of water' in the boiler, and at same time pump 9 descends,forcing cold air through valve 25 and pipe 12 into the re-box,which raises valve 16, and follows piston in pump 2l. Valves 1 1 1 also rise when the air is sufficiently compressed in the hre-box, allowing the air to escape from the nre-box direct into the boiler. A larger number of valves 1 are used than those shown in the drawing,as many valves being, by preference, used as can be placed in the top of the fire-box. `All the pumps so far described are single acting, the object being to cause their pistons to always descend to the bottom of their cylinders without regard to the length of their stroke. rlhus when the stroke is changed by lowering the fulcrum of the walking-beam on the upright 28, or changing the pump piston-rods to diiierent holes. on the walking-beam, the pistons of said pumps are still madeto work down to the bottom ends of their cylinders.

At 40 is a double-acting gas or petroleum pump with a supply-pipe, 41, having ascrew to regulate the quantity of gas or petroleum IOO At the top ofthe boiler is a steam-pipe,5, with throttle valve leading to the engine, while 6l is a return-pipe that takes steam from the top ot' the boiler and carries it to the irebox. rlhis pipe is provided with a screwvalve, and is used for increasing the blast in the tire-box and reheating the steam and air.

In starting the boiler, the eap 17 is iirst removed from the ash-pit, and valve 16 is then raised and propped up. Pump-rod 6 is detached from the walking-beam, and is dropped down to large part of pun'ip-liarrel just above valve 16. It' solid fuel Yis used, door 13 is raised by lever 51. 1f gas or petroleum is used,this door is kept closed after lighting and supplying the gas or petroleum through pipe 43. The boiler can now be red as ordinary ones, a natural draft of air passing in at 17 through lire-box, and out through valve 16, pump 21, and pipe 23 to the smoke-stack. When a few pounds of steam are generated, cap 17 is replaced,and the valve 16 is let down, the pump-rod is attached to beam 34, and the door 13 is closed airtight. XV hen fresh fuel is to be added, the air-cocks 19 are opened, which allows the hot-air pumps 2() and 2l to take the expansive force from the air in the iire boX, and the door can then be opened and new fuel added, the door and air-cocks being then closed; or, if desired, the boiler can be run with cap 17 removed and air-cocks open, causing pumps 20 and 21 to furnish draft by suction.

To the boiler as thus described there are to be attached the usual appendages, such as steam-pipes, watergages, safety-valve, steamvalve, governor, &c. There is also apressuregage, G,conneeting with tlieiire box, in order that the engineer can compare the pressure in the rebox with the pressure in the boiler.

Having thus described my invention, what I claim as new is 1. The combination,with a boiler and allermetically-sealed lire-box, ot' the walking-beam 34, the pumps 8 and 9, valves 1S and 25, and

the pipes 11 and 12, leading to the ash-pit ol' the iire-boX and valves 1. leading into the boiler, and for the purpose described..

2. The combination, with a boiler and a fireb'oX, of the hot-air pumps 20 and 21, having valves 16 and 27, opening inwardly from the lire-box to the pumps, and valves 14: and 15, opening outwardly from the pumps into the boilei-,and the walking-beam 34, attached to the pistons of said pumps, as and for the purY pose described.

3. The combination of a steam-boiler, ahern'ietically-closed tire-box having valves opening inwardly to the same, and other valves opening outwardly from the fire-box and into the boiler, and a pressure-gage having eo1nmunication with the tire-box for indicating the pressure in the lire-box for comparison with the boiler or when charging fuel into the lire box, as described.

4.' The combination of boiler 22, fire-box 55, cold-air pumps 8 and 9, valved pipes 11 and 12, hot-air pumps 20 and 21, with valves 16 and 17, and 14 and 15, the petroleun'i or pump 40, and awalking-beam,3d., connected to and operating all ot' said pumps, as and l'orthe purpose described.

BENJAMIN lf IANKLIN WRIGHT.

Vitnesses:

A. C. Pinon, J. 1V. SMo'rnnns. 

